1851474240 has 896 divisors, whose sum is σ = 8567562240. Its totient is φ = 367994880.

The previous prime is 1851474223. The next prime is 1851474259. The reversal of 1851474240 is 424741581.

It is a happy number.

1851474240 is a `hidden beast` number, since 185 + 1 + 474 + 2 + 4 + 0 = 666.

It is a super-2 number, since 2×1851474240² = 6855913722767155200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1851474195 and 1851474204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 80498869 + ... + 80498891.

Almost surely, 2^1851474240 is an apocalyptic number.

1851474240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1851474240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4283781120).

1851474240 is an abundant number, since it is smaller than the sum of its proper divisors (6716088000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1851474240 is a wasteful number, since it uses less digits than its factorization.

1851474240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89 (or 51 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 1851474240 is about 43028.7606142682. The cubic root of 1851474240 is about 1227.9270258354.

The spelling of 1851474240 in words is "one billion, eight hundred fifty-one million, four hundred seventy-four thousand, two hundred forty".