28058017438 has 32 divisors (see below), whose sum is σ = 48832035840. Its totient is φ = 11949567360.

The previous prime is 28058017433. The next prime is 28058017441. The reversal of 28058017438 is 83471085082.

It is a super-2 number, since 2×28058017438² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28058017433) 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, 84808 + ... + 251611.

It is an arithmetic number, because the mean of its divisors is an integer number (1526001120).

Almost surely, 2^28058017438 is an apocalyptic number.

28058017438 is a deficient number, since it is larger than the sum of its proper divisors (20774018402).

28058017438 is a wasteful number, since it uses less digits than its factorization.

28058017438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336672.

The product of its (nonzero) digits is 430080, while the sum is 46.

The spelling of 28058017438 in words is "twenty-eight billion, fifty-eight million, seventeen thousand, four hundred thirty-eight".