78049590 has 32 divisors (see below), whose sum is σ = 189962496. Its totient is φ = 20519520.

The previous prime is 78049577. The next prime is 78049597. The reversal of 78049590 is 9594087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78049597) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16192 + ... + 20451.

It is an arithmetic number, because the mean of its divisors is an integer number (5936328).

Almost surely, 2^78049590 is an apocalyptic number.

78049590 is an abundant number, since it is smaller than the sum of its proper divisors (111912906).

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

78049590 is a wasteful number, since it uses less digits than its factorization.

78049590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36724.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 78049590 is about 8834.5679011483. The cubic root of 78049590 is about 427.3563964849.

The spelling of 78049590 in words is "seventy-eight million, forty-nine thousand, five hundred ninety".