1851140740 has 48 divisors (see below), whose sum is σ = 4269928320. Its totient is φ = 670982400.

The previous prime is 1851140737. The next prime is 1851140741. The reversal of 1851140740 is 470411581.

It is not an unprimeable number, because it can be changed into a prime (1851140741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97161 + ... + 114640.

It is an arithmetic number, because the mean of its divisors is an integer number (88956840).

Almost surely, 2^1851140740 is an apocalyptic number.

1851140740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1851140740 is an abundant number, since it is smaller than the sum of its proper divisors (2418787580).

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

1851140740 is a wasteful number, since it uses less digits than its factorization.

1851140740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211852 (or 211850 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 1851140740 is about 43024.8851247740. The cubic root of 1851140740 is about 1227.8532939151.

The spelling of 1851140740 in words is "one billion, eight hundred fifty-one million, one hundred forty thousand, seven hundred forty".