78293430590 has 32 divisors (see below), whose sum is σ = 142326344160. Its totient is φ = 31008182400.

The previous prime is 78293430541. The next prime is 78293430599. The reversal of 78293430590 is 9503439287.

It is a happy number.

It is a super-2 number, since 2×78293430590² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78293430599) 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, 320045 + ... + 508935.

It is an arithmetic number, because the mean of its divisors is an integer number (4447698255).

Almost surely, 2^78293430590 is an apocalyptic number.

78293430590 is a deficient number, since it is larger than the sum of its proper divisors (64032913570).

78293430590 is a wasteful number, since it uses less digits than its factorization.

78293430590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189308.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 78293430590 in words is "seventy-eight billion, two hundred ninety-three million, four hundred thirty thousand, five hundred ninety".