427976640 has 672 divisors, whose sum is σ = 1917167616. Its totient is φ = 85155840.

The previous prime is 427976621. The next prime is 427976641. The reversal of 427976640 is 46679724.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427976641) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6027805 + ... + 6027875.

It is an arithmetic number, because the mean of its divisors is an integer number (2852928).

Almost surely, 2^427976640 is an apocalyptic number.

427976640 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 427976640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (958583808).

427976640 is an abundant number, since it is smaller than the sum of its proper divisors (1489190976).

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

427976640 is a wasteful number, since it uses less digits than its factorization.

427976640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The square root of 427976640 is about 20687.5962837639. The cubic root of 427976640 is about 753.5984935126.

The spelling of 427976640 in words is "four hundred twenty-seven million, nine hundred seventy-six thousand, six hundred forty".