425640450 has 48 divisors (see below), whose sum is σ = 1057655520. Its totient is φ = 113281920.

The previous prime is 425640427. The next prime is 425640469. The reversal of 425640450 is 54046524.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 82857 + ... + 87843.

It is an arithmetic number, because the mean of its divisors is an integer number (22034490).

Almost surely, 2^425640450 is an apocalyptic number.

425640450 is an abundant number, since it is smaller than the sum of its proper divisors (632015070).

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

425640450 is a wasteful number, since it uses less digits than its factorization.

425640450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5571 (or 5566 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 425640450 is about 20631.0554746964. The cubic root of 425640450 is about 752.2247717730.

Adding to 425640450 its reverse (54046524), we get a palindrome (479686974).

The spelling of 425640450 in words is "four hundred twenty-five million, six hundred forty thousand, four hundred fifty".