615948840 has 256 divisors, whose sum is σ = 2328480000. Its totient is φ = 143576064.

The previous prime is 615948799. The next prime is 615948841. The reversal of 615948840 is 48849516.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (615948841) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 265606 + ... + 267914.

It is an arithmetic number, because the mean of its divisors is an integer number (9095625).

Almost surely, 2^615948840 is an apocalyptic number.

615948840 is a gapful number since it is divisible by the number (60) 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 615948840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1164240000).

615948840 is an abundant number, since it is smaller than the sum of its proper divisors (1712531160).

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

615948840 is a wasteful number, since it uses less digits than its factorization.

615948840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2361 (or 2351 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 615948840 is about 24818.3166230105. The cubic root of 615948840 is about 850.8406170618.

The spelling of 615948840 in words is "six hundred fifteen million, nine hundred forty-eight thousand, eight hundred forty".