122445890 has 48 divisors (see below), whose sum is σ = 256222656. Its totient is φ = 41270880.

The previous prime is 122445889. The next prime is 122445901. The reversal of 122445890 is 98544221.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 122445890.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 352697 + ... + 353043.

It is an arithmetic number, because the mean of its divisors is an integer number (5337972).

Almost surely, 2^122445890 is an apocalyptic number.

122445890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122445890 is an abundant number, since it is smaller than the sum of its proper divisors (133776766).

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

122445890 is an equidigital number, since it uses as much as digits as its factorization.

122445890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503 (or 432 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 122445890 is about 11065.5270999623. The cubic root of 122445890 is about 496.5710584751.

The spelling of 122445890 in words is "one hundred twenty-two million, four hundred forty-five thousand, eight hundred ninety".