7138693920 has 48 divisors (see below), whose sum is σ = 22486887360. Its totient is φ = 1903651584.

The previous prime is 7138693897. The next prime is 7138693921. The reversal of 7138693920 is 293968317.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 7138693920.

It is not an unprimeable number, because it can be changed into a prime (7138693921) 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, 7435660 + ... + 7436619.

It is an arithmetic number, because the mean of its divisors is an integer number (468476820).

Almost surely, 2^7138693920 is an apocalyptic number.

It is an amenable number.

7138693920 is an abundant number, since it is smaller than the sum of its proper divisors (15348193440).

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

7138693920 is a wasteful number, since it uses less digits than its factorization.

7138693920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14872297 (or 14872289 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 7138693920 is about 84490.7919243275. The cubic root of 7138693920 is about 1925.4825501908.

The spelling of 7138693920 in words is "seven billion, one hundred thirty-eight million, six hundred ninety-three thousand, nine hundred twenty".