425215840 has 192 divisors, whose sum is σ = 1220825088. Its totient is φ = 136857600.

The previous prime is 425215831. The next prime is 425215853. The reversal of 425215840 is 48512524.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1284475 + ... + 1284805.

It is an arithmetic number, because the mean of its divisors is an integer number (6358464).

Almost surely, 2^425215840 is an apocalyptic number.

425215840 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 425215840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (610412544).

425215840 is an abundant number, since it is smaller than the sum of its proper divisors (795609248).

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

425215840 is a wasteful number, since it uses less digits than its factorization.

425215840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 31.

The square root of 425215840 is about 20620.7623525417. The cubic root of 425215840 is about 751.9745539903.

The spelling of 425215840 in words is "four hundred twenty-five million, two hundred fifteen thousand, eight hundred forty".