78038380 has 36 divisors (see below), whose sum is σ = 190639008. Its totient is φ = 26755680.

The previous prime is 78038371. The next prime is 78038383. The reversal of 78038380 is 8383087.

It is not an unprimeable number, because it can be changed into a prime (78038383) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 38836 + ... + 40795.

It is an arithmetic number, because the mean of its divisors is an integer number (5295528).

Almost surely, 2^78038380 is an apocalyptic number.

78038380 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

78038380 is an abundant number, since it is smaller than the sum of its proper divisors (112600628).

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

78038380 is a wasteful number, since it uses less digits than its factorization.

78038380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79654 (or 79645 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 78038380 is about 8833.9334387350. The cubic root of 78038380 is about 427.3359355849.

The spelling of 78038380 in words is "seventy-eight million, thirty-eight thousand, three hundred eighty".