1850040640 has 224 divisors, whose sum is σ = 5613684480. Its totient is φ = 565346304.

The previous prime is 1850040613. The next prime is 1850040671. The reversal of 1850040640 is 460400581.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 1850040599 and 1850040608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 722242 + ... + 724798.

Almost surely, 2^1850040640 is an apocalyptic number.

1850040640 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 1850040640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2806842240).

1850040640 is an abundant number, since it is smaller than the sum of its proper divisors (3763643840).

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

1850040640 is a wasteful number, since it uses less digits than its factorization.

1850040640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2617 (or 2607 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 1850040640 is about 43012.0987630225. The cubic root of 1850040640 is about 1227.6100152625.

The spelling of 1850040640 in words is "one billion, eight hundred fifty million, forty thousand, six hundred forty".