425466640 has 20 divisors (see below), whose sum is σ = 989210124. Its totient is φ = 170186624.

The previous prime is 425466623. The next prime is 425466653. The reversal of 425466640 is 46664524.

It can be written as a sum of positive squares in 2 ways, for example, as 221890816 + 203575824 = 14896^2 + 14268^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 425466640.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2659087 + ... + 2659246.

Almost surely, 2^425466640 is an apocalyptic number.

425466640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

425466640 is an abundant number, since it is smaller than the sum of its proper divisors (563743484).

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

425466640 is a wasteful number, since it uses less digits than its factorization.

425466640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5318346 (or 5318340 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

The square root of 425466640 is about 20626.8427055621. The cubic root of 425466640 is about 752.1223676680.

The spelling of 425466640 in words is "four hundred twenty-five million, four hundred sixty-six thousand, six hundred forty".