39732891428 has 24 divisors (see below), whose sum is σ = 73514632800. Its totient is φ = 18737923968.

The previous prime is 39732891427. The next prime is 39732891463. The reversal of 39732891428 is 82419823793.

It is a super-2 number, since 2×39732891428² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39732891421) 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, 1134293 + ... + 1168796.

It is an arithmetic number, because the mean of its divisors is an integer number (3063109700).

Almost surely, 2^39732891428 is an apocalyptic number.

39732891428 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

39732891428 is a deficient number, since it is larger than the sum of its proper divisors (33781741372).

39732891428 is a wasteful number, since it uses less digits than its factorization.

39732891428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2303339 (or 2303337 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 56.

The spelling of 39732891428 in words is "thirty-nine billion, seven hundred thirty-two million, eight hundred ninety-one thousand, four hundred twenty-eight".