7420402638 has 24 divisors (see below), whose sum is σ = 17539133976. Its totient is φ = 2248606800.

The previous prime is 7420402631. The next prime is 7420402643. The reversal of 7420402638 is 8362040247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7420402631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18738193 + ... + 18738588.

It is an arithmetic number, because the mean of its divisors is an integer number (730797249).

Almost surely, 2^7420402638 is an apocalyptic number.

7420402638 is an abundant number, since it is smaller than the sum of its proper divisors (10118731338).

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

7420402638 is a wasteful number, since it uses less digits than its factorization.

7420402638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37476800 (or 37476797 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 7420402638 is about 86141.7589674137. The cubic root of 7420402638 is about 1950.4844413752.

The spelling of 7420402638 in words is "seven billion, four hundred twenty million, four hundred two thousand, six hundred thirty-eight".