1902399040 has 56 divisors (see below), whose sum is σ = 4565855232. Its totient is φ = 754951680.

The previous prime is 1902399011. The next prime is 1902399049. The reversal of 1902399040 is 409932091.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1902399049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17235 + ... + 64045.

Almost surely, 2^1902399040 is an apocalyptic number.

1902399040 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 1902399040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2282927616).

1902399040 is an abundant number, since it is smaller than the sum of its proper divisors (2663456192).

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

1902399040 is a wasteful number, since it uses less digits than its factorization.

1902399040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46955 (or 46945 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 1902399040 is about 43616.4996303005. The cubic root of 1902399040 is about 1239.0834017090.

The spelling of 1902399040 in words is "one billion, nine hundred two million, three hundred ninety-nine thousand, forty".