7230931638 has 32 divisors (see below), whose sum is σ = 16530533376. Its totient is φ = 2065644288.

The previous prime is 7230931633. The next prime is 7230931661. The reversal of 7230931638 is 8361390327.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 7230931638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7230931633) 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, 372870 + ... + 391782.

It is an arithmetic number, because the mean of its divisors is an integer number (516579168).

Almost surely, 2^7230931638 is an apocalyptic number.

7230931638 is an abundant number, since it is smaller than the sum of its proper divisors (9299601738).

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

7230931638 is a wasteful number, since it uses less digits than its factorization.

7230931638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28028.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 7230931638 is about 85034.8848296980. The cubic root of 7230931638 is about 1933.7400195651.

The spelling of 7230931638 in words is "seven billion, two hundred thirty million, nine hundred thirty-one thousand, six hundred thirty-eight".