28431417540 has 48 divisors (see below), whose sum is σ = 80380879488. Its totient is φ = 7508100864.

The previous prime is 28431417479. The next prime is 28431417541. The reversal of 28431417540 is 4571413482.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28431417541) 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, 2294097 + ... + 2306456.

It is an arithmetic number, because the mean of its divisors is an integer number (1674601656).

Almost surely, 2^28431417540 is an apocalyptic number.

28431417540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28431417540 is an abundant number, since it is smaller than the sum of its proper divisors (51949461948).

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

28431417540 is a wasteful number, since it uses less digits than its factorization.

28431417540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4600668 (or 4600666 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 39.

The spelling of 28431417540 in words is "twenty-eight billion, four hundred thirty-one million, four hundred seventeen thousand, five hundred forty".