615625420 has 48 divisors (see below), whose sum is σ = 1391348448. Its totient is φ = 227957760.

The previous prime is 615625397. The next prime is 615625421. The reversal of 615625420 is 24526516.

It is not an unprimeable number, because it can be changed into a prime (615625421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5899 + ... + 35581.

It is an arithmetic number, because the mean of its divisors is an integer number (28986426).

Almost surely, 2^615625420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 615625420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (695674224).

615625420 is an abundant number, since it is smaller than the sum of its proper divisors (775723028).

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

615625420 is a wasteful number, since it uses less digits than its factorization.

615625420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29770 (or 29768 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 615625420 is about 24811.8000153153. The cubic root of 615625420 is about 850.6916723055.

The spelling of 615625420 in words is "six hundred fifteen million, six hundred twenty-five thousand, four hundred twenty".