615423040 has 28 divisors (see below), whose sum is σ = 1465476876. Its totient is φ = 246169088.

The previous prime is 615423037. The next prime is 615423049. The reversal of 615423040 is 40324516.

It can be written as a sum of positive squares in 2 ways, for example, as 335329344 + 280093696 = 18312^2 + 16736^2 .

It is a junction number, because it is equal to n+sod(n) for n = 615422996 and 615423014.

It is not an unprimeable number, because it can be changed into a prime (615423049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 961279 + ... + 961918.

Almost surely, 2^615423040 is an apocalyptic number.

It is an amenable number.

615423040 is an abundant number, since it is smaller than the sum of its proper divisors (850053836).

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

615423040 is a wasteful number, since it uses less digits than its factorization.

615423040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1923214 (or 1923204 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 615423040 is about 24807.7213786353. The cubic root of 615423040 is about 850.5984436180.

Adding to 615423040 its reverse (40324516), we get a palindrome (655747556).

The spelling of 615423040 in words is "six hundred fifteen million, four hundred twenty-three thousand, forty".