22078100 has 36 divisors (see below), whose sum is σ = 52267488. Its totient is φ = 8028000.

The previous prime is 22078097. The next prime is 22078117. The reversal of 22078100 is 187022.

It is a super-2 number, since 2×22078100² = 974884999220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8936 + ... + 11135.

Almost surely, 2^22078100 is an apocalyptic number.

22078100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22078100 is an abundant number, since it is smaller than the sum of its proper divisors (30189388).

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

22078100 is a wasteful number, since it uses less digits than its factorization.

22078100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20096 (or 20089 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 22078100 is about 4698.7338720128. The cubic root of 22078100 is about 280.5351161283.

The spelling of 22078100 in words is "twenty-two million, seventy-eight thousand, one hundred".