427721490 has 72 divisors (see below), whose sum is σ = 1293652620. Its totient is φ = 97763904.

The previous prime is 427721467. The next prime is 427721491. The reversal of 427721490 is 94127724.

It can be written as a sum of positive squares in 2 ways, for example, as 422672481 + 5049009 = 20559^2 + 2247^2 .

It is not an unprimeable number, because it can be changed into a prime (427721491) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 44085 + ... + 52904.

Almost surely, 2^427721490 is an apocalyptic number.

427721490 is an abundant number, since it is smaller than the sum of its proper divisors (865931130).

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

427721490 is a wasteful number, since it uses less digits than its factorization.

427721490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97016 (or 97006 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 427721490 is about 20681.4286257019. The cubic root of 427721490 is about 753.4487042785.

The spelling of 427721490 in words is "four hundred twenty-seven million, seven hundred twenty-one thousand, four hundred ninety".