28074031980 has 24 divisors (see below), whose sum is σ = 78607289712. Its totient is φ = 7486408512.

The previous prime is 28074031949. The next prime is 28074031987. The reversal of 28074031980 is 8913047082.

It is a super-2 number, since 2×28074031980² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28074031987) 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, 233950207 + ... + 233950326.

It is an arithmetic number, because the mean of its divisors is an integer number (3275303738).

Almost surely, 2^28074031980 is an apocalyptic number.

28074031980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28074031980 is an abundant number, since it is smaller than the sum of its proper divisors (50533257732).

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

28074031980 is a wasteful number, since it uses less digits than its factorization.

28074031980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467900545 (or 467900543 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The spelling of 28074031980 in words is "twenty-eight billion, seventy-four million, thirty-one thousand, nine hundred eighty".