78290413 has 6 divisors (see below), whose sum is σ = 81842894. Its totient is φ = 74885976.

The previous prime is 78290347. The next prime is 78290419. The reversal of 78290413 is 31409287.

It can be written as a sum of positive squares in only one way, i.e., 75986089 + 2304324 = 8717^2 + 1518^2 .

It is not a de Polignac number, because 78290413 - 2¹³ = 78282221 is a prime.

It is a super-2 number, since 2×78290413² = 12258777535421138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78290419) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 73470 + ... + 74527.

Almost surely, 2^78290413 is an apocalyptic number.

It is an amenable number.

78290413 is a deficient number, since it is larger than the sum of its proper divisors (3552481).

78290413 is a wasteful number, since it uses less digits than its factorization.

78290413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148043 (or 148020 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 78290413 is about 8848.1869894346. The cubic root of 78290413 is about 427.7954830525.

The spelling of 78290413 in words is "seventy-eight million, two hundred ninety thousand, four hundred thirteen".