652178638 has 4 divisors (see below), whose sum is σ = 978267960. Its totient is φ = 326089318.

The previous prime is 652178617. The next prime is 652178641. The reversal of 652178638 is 836871256.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 163044658 + ... + 163044661.

It is an arithmetic number, because the mean of its divisors is an integer number (244566990).

Almost surely, 2^652178638 is an apocalyptic number.

652178638 is a deficient number, since it is larger than the sum of its proper divisors (326089322).

652178638 is a wasteful number, since it uses less digits than its factorization.

652178638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326089321.

The product of its digits is 483840, while the sum is 46.

The square root of 652178638 is about 25537.7884320471. The cubic root of 652178638 is about 867.2058319311.

The spelling of 652178638 in words is "six hundred fifty-two million, one hundred seventy-eight thousand, six hundred thirty-eight".