425155440 has 40 divisors (see below), whose sum is σ = 1317982608. Its totient is φ = 113374720.

The previous prime is 425155439. The next prime is 425155463. The reversal of 425155440 is 44551524.

It is a tau number, because it is divible by the number of its divisors (40).

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

It is a junction number, because it is equal to n+sod(n) for n = 425155398 and 425155407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 885501 + ... + 885980.

Almost surely, 2^425155440 is an apocalyptic number.

425155440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

425155440 is an abundant number, since it is smaller than the sum of its proper divisors (892827168).

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

425155440 is a wasteful number, since it uses less digits than its factorization.

425155440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771497 (or 1771491 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 30.

The square root of 425155440 is about 20619.2977571982. The cubic root of 425155440 is about 751.9389474352.

The spelling of 425155440 in words is "four hundred twenty-five million, one hundred fifty-five thousand, four hundred forty".