78379154 has 16 divisors (see below), whose sum is σ = 135110976. Its totient is φ = 33404400.

The previous prime is 78379111. The next prime is 78379157. The reversal of 78379154 is 45197387.

It is a super-2 number, since 2×78379154² = 12286583563511432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78379157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12932 + ... + 17999.

It is an arithmetic number, because the mean of its divisors is an integer number (8444436).

Almost surely, 2^78379154 is an apocalyptic number.

78379154 is a deficient number, since it is larger than the sum of its proper divisors (56731822).

78379154 is a wasteful number, since it uses less digits than its factorization.

78379154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31121.

The product of its digits is 211680, while the sum is 44.

The square root of 78379154 is about 8853.2002123526. The cubic root of 78379154 is about 427.9570552597.

The spelling of 78379154 in words is "seventy-eight million, three hundred seventy-nine thousand, one hundred fifty-four".