78293380 has 48 divisors (see below), whose sum is σ = 187173504. Its totient is φ = 27230720.

The previous prime is 78293353. The next prime is 78293393. The reversal of 78293380 is 8339287.

It is a happy number.

It is a super-2 number, since 2×78293380² = 12259706703648800, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 2677 + ... + 12796.

It is an arithmetic number, because the mean of its divisors is an integer number (3899448).

Almost surely, 2^78293380 is an apocalyptic number.

It is an amenable number.

78293380 is an abundant number, since it is smaller than the sum of its proper divisors (108880124).

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

78293380 is a wasteful number, since it uses less digits than its factorization.

78293380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15516 (or 15514 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 78293380 is about 8848.3546493119. The cubic root of 78293380 is about 427.8008870907.

The spelling of 78293380 in words is "seventy-eight million, two hundred ninety-three thousand, three hundred eighty".