122402820 has 24 divisors (see below), whose sum is σ = 342728064. Its totient is φ = 32640736.

The previous prime is 122402789. The next prime is 122402821. The reversal of 122402820 is 28204221.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (122402821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1019964 + ... + 1020083.

It is an arithmetic number, because the mean of its divisors is an integer number (14280336).

Almost surely, 2^122402820 is an apocalyptic number.

122402820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122402820 is an abundant number, since it is smaller than the sum of its proper divisors (220325244).

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

122402820 is a wasteful number, since it uses less digits than its factorization.

122402820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040059 (or 2040057 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 122402820 is about 11063.5807946614. The cubic root of 122402820 is about 496.5128291526.

The spelling of 122402820 in words is "one hundred twenty-two million, four hundred two thousand, eight hundred twenty".