612304440 has 64 divisors (see below), whose sum is σ = 2003909760. Its totient is φ = 148437120.

The previous prime is 612304423. The next prime is 612304481. The reversal of 612304440 is 44403216.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 612304440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230614 + ... + 233253.

It is an arithmetic number, because the mean of its divisors is an integer number (31311090).

Almost surely, 2^612304440 is an apocalyptic number.

612304440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

612304440 is an abundant number, since it is smaller than the sum of its proper divisors (1391605320).

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

612304440 is a wasteful number, since it uses less digits than its factorization.

612304440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463892 (or 463888 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 612304440 is about 24744.7861174834. The cubic root of 612304440 is about 849.1592332309.

Adding to 612304440 its reverse (44403216), we get a palindrome (656707656).

The spelling of 612304440 in words is "six hundred twelve million, three hundred four thousand, four hundred forty".