78072830 has 48 divisors (see below), whose sum is σ = 156107952. Its totient is φ = 28089600.

The previous prime is 78072811. The next prime is 78072851. The reversal of 78072830 is 3827087.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 136445 + ... + 137015.

It is an arithmetic number, because the mean of its divisors is an integer number (3252249).

Almost surely, 2^78072830 is an apocalyptic number.

78072830 is a deficient number, since it is larger than the sum of its proper divisors (78035122).

78072830 is a wasteful number, since it uses less digits than its factorization.

78072830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713 (or 702 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 78072830 is about 8835.8830911234. The cubic root of 78072830 is about 427.3988087387.

The spelling of 78072830 in words is "seventy-eight million, seventy-two thousand, eight hundred thirty".