427021900 has 72 divisors (see below), whose sum is σ = 964382720. Its totient is φ = 163944000.

The previous prime is 427021883. The next prime is 427021943. The reversal of 427021900 is 9120724.

It is a super-2 number, since 2×427021900² = 364695406159220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

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, 430405 + ... + 431395.

Almost surely, 2^427021900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 427021900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (482191360).

427021900 is an abundant number, since it is smaller than the sum of its proper divisors (537360820).

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

427021900 is a wasteful number, since it uses less digits than its factorization.

427021900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175 (or 1168 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 427021900 is about 20664.5082206183. The cubic root of 427021900 is about 753.0376947516.

The spelling of 427021900 in words is "four hundred twenty-seven million, twenty-one thousand, nine hundred".