78851830 has 16 divisors (see below), whose sum is σ = 142090704. Its totient is φ = 31505760.

The previous prime is 78851821. The next prime is 78851849. The reversal of 78851830 is 3815887.

It is a super-2 number, since 2×78851830² = 12435222188697800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6349 + ... + 14071.

It is an arithmetic number, because the mean of its divisors is an integer number (8880669).

Almost surely, 2^78851830 is an apocalyptic number.

78851830 is a deficient number, since it is larger than the sum of its proper divisors (63238874).

78851830 is a wasteful number, since it uses less digits than its factorization.

78851830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8751.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 78851830 is about 8879.8552916137. The cubic root of 78851830 is about 428.8156158165.

The spelling of 78851830 in words is "seventy-eight million, eight hundred fifty-one thousand, eight hundred thirty".