122978500 has 48 divisors (see below), whose sum is σ = 272668032. Its totient is φ = 48444000.

The previous prime is 122978489. The next prime is 122978543. The reversal of 122978500 is 5879221.

It is a super-2 number, since 2×122978500² = 30247422924500000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31665 + ... + 35335.

It is an arithmetic number, because the mean of its divisors is an integer number (5680584).

Almost surely, 2^122978500 is an apocalyptic number.

122978500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122978500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136334016).

122978500 is an abundant number, since it is smaller than the sum of its proper divisors (149689532).

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

122978500 is a wasteful number, since it uses less digits than its factorization.

122978500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3757 (or 3745 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 122978500 is about 11089.5671691911. The cubic root of 122978500 is about 497.2900050580.

The spelling of 122978500 in words is "one hundred twenty-two million, nine hundred seventy-eight thousand, five hundred".