79001890 has 64 divisors (see below), whose sum is σ = 166561920. Its totient is φ = 26659840.

The previous prime is 79001863. The next prime is 79001891. The reversal of 79001890 is 9810097.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (79001891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154956 + ... + 155464.

It is an arithmetic number, because the mean of its divisors is an integer number (2602530).

Almost surely, 2^79001890 is an apocalyptic number.

79001890 is an abundant number, since it is smaller than the sum of its proper divisors (87560030).

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

79001890 is a wasteful number, since it uses less digits than its factorization.

79001890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 79001890 is about 8888.3007374863. The cubic root of 79001890 is about 429.0874644848.

The spelling of 79001890 in words is "seventy-nine million, one thousand, eight hundred ninety".