427616280 has 512 divisors, whose sum is σ = 1854720000. Its totient is φ = 85100544.

The previous prime is 427616269. The next prime is 427616303. The reversal of 427616280 is 82616724.

427616280 is a `hidden beast` number, since 4 + 27 + 6 + 1 + 628 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1867206 + ... + 1867434.

It is an arithmetic number, because the mean of its divisors is an integer number (3622500).

Almost surely, 2^427616280 is an apocalyptic number.

427616280 is a gapful number since it is divisible by the number (40) 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 427616280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (927360000).

427616280 is an abundant number, since it is smaller than the sum of its proper divisors (1427103720).

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

427616280 is a wasteful number, since it uses less digits than its factorization.

427616280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 427616280 is about 20678.8848828944. The cubic root of 427616280 is about 753.3869219891.

The spelling of 427616280 in words is "four hundred twenty-seven million, six hundred sixteen thousand, two hundred eighty".