122639930 has 32 divisors (see below), whose sum is σ = 252768384. Its totient is φ = 41967936.

The previous prime is 122639899. The next prime is 122639939. The reversal of 122639930 is 39936221.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (122639939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44369 + ... + 47051.

It is an arithmetic number, because the mean of its divisors is an integer number (7899012).

Almost surely, 2^122639930 is an apocalyptic number.

122639930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122639930 is an abundant number, since it is smaller than the sum of its proper divisors (130128454).

122639930 is a wasteful number, since it uses less digits than its factorization.

122639930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3350.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 122639930 is about 11074.2913994531. The cubic root of 122639930 is about 496.8332254214.

The spelling of 122639930 in words is "one hundred twenty-two million, six hundred thirty-nine thousand, nine hundred thirty".