78152990 has 16 divisors (see below), whose sum is σ = 141139152. Its totient is φ = 31158144.

The previous prime is 78152989. The next prime is 78153043. The reversal of 78152990 is 9925187.

It is a super-2 number, since 2×78152990² = 12215779691880200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9659 + ... + 15798.

It is an arithmetic number, because the mean of its divisors is an integer number (8821197).

Almost surely, 2^78152990 is an apocalyptic number.

78152990 is a deficient number, since it is larger than the sum of its proper divisors (62986162).

78152990 is a wasteful number, since it uses less digits than its factorization.

78152990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25771.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 78152990 is about 8840.4179765439. The cubic root of 78152990 is about 427.5450336153.

The spelling of 78152990 in words is "seventy-eight million, one hundred fifty-two thousand, nine hundred ninety".