7524138028 has 48 divisors (see below), whose sum is σ = 15081083136. Its totient is φ = 3251223360.

The previous prime is 7524138023. The next prime is 7524138031. The reversal of 7524138028 is 8208314257.

It is a happy number.

It is a super-2 number, since 2×7524138028² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) 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 (7524138023) 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, 142150 + ... + 187762.

It is an arithmetic number, because the mean of its divisors is an integer number (314189232).

Almost surely, 2^7524138028 is an apocalyptic number.

It is an amenable number.

7524138028 is an abundant number, since it is smaller than the sum of its proper divisors (7556945108).

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

7524138028 is a wasteful number, since it uses less digits than its factorization.

7524138028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45814 (or 45812 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 7524138028 is about 86741.7893981903. The cubic root of 7524138028 is about 1959.5315092270.

The spelling of 7524138028 in words is "seven billion, five hundred twenty-four million, one hundred thirty-eight thousand, twenty-eight".