78354788 has 6 divisors (see below), whose sum is σ = 137120886. Its totient is φ = 39177392.

The previous prime is 78354761. The next prime is 78354791. The reversal of 78354788 is 88745387.

It can be written as a sum of positive squares in only one way, i.e., 72556324 + 5798464 = 8518^2 + 2408^2 .

It is a super-2 number, since 2×78354788² = 12278945605049888, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9794345 + ... + 9794352.

It is an arithmetic number, because the mean of its divisors is an integer number (22853481).

Almost surely, 2^78354788 is an apocalyptic number.

It is an amenable number.

78354788 is a deficient number, since it is larger than the sum of its proper divisors (58766098).

78354788 is a wasteful number, since it uses less digits than its factorization.

78354788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19588701 (or 19588699 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 50.

The square root of 78354788 is about 8851.8239928277. The cubic root of 78354788 is about 427.9127038311.

The spelling of 78354788 in words is "seventy-eight million, three hundred fifty-four thousand, seven hundred eighty-eight".