78190746 has 16 divisors (see below), whose sum is σ = 156554208. Its totient is φ = 26034800.

The previous prime is 78190703. The next prime is 78190747. The reversal of 78190746 is 64709187.

It is a super-2 number, since 2×78190746² = 12227585520073032, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78190698 and 78190707.

It is not an unprimeable number, because it can be changed into a prime (78190747) by changing a digit.

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, 885 + ... + 12536.

It is an arithmetic number, because the mean of its divisors is an integer number (9784638).

Almost surely, 2^78190746 is an apocalyptic number.

78190746 is an abundant number, since it is smaller than the sum of its proper divisors (78363462).

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

78190746 is a wasteful number, since it uses less digits than its factorization.

78190746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14397.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 78190746 is about 8842.5531380931. The cubic root of 78190746 is about 427.6138720628.

The spelling of 78190746 in words is "seventy-eight million, one hundred ninety thousand, seven hundred forty-six".