615228420 has 24 divisors (see below), whose sum is σ = 1722639744. Its totient is φ = 164060896.

The previous prime is 615228409. The next prime is 615228421. The reversal of 615228420 is 24822516.

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

It is not an unprimeable number, because it can be changed into a prime (615228421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5126844 + ... + 5126963.

It is an arithmetic number, because the mean of its divisors is an integer number (71776656).

Almost surely, 2^615228420 is an apocalyptic number.

615228420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

615228420 is an abundant number, since it is smaller than the sum of its proper divisors (1107411324).

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

615228420 is a wasteful number, since it uses less digits than its factorization.

615228420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10253819 (or 10253817 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 615228420 is about 24803.7984994234. The cubic root of 615228420 is about 850.5087703842.

The spelling of 615228420 in words is "six hundred fifteen million, two hundred twenty-eight thousand, four hundred twenty".