612508440 has 128 divisors (see below), whose sum is σ = 1878448320. Its totient is φ = 159744000.

The previous prime is 612508411. The next prime is 612508451. The reversal of 612508440 is 44805216.

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

It is a junction number, because it is equal to n+sod(n) for n = 612508398 and 612508407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1175380 + ... + 1175900.

Almost surely, 2^612508440 is an apocalyptic number.

612508440 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 612508440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (939224160).

612508440 is an abundant number, since it is smaller than the sum of its proper divisors (1265939880).

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

612508440 is a wasteful number, since it uses less digits than its factorization.

612508440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733 (or 729 counting only the distinct ones).

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

The square root of 612508440 is about 24748.9078546913. The cubic root of 612508440 is about 849.2535268741.

The spelling of 612508440 in words is "six hundred twelve million, five hundred eight thousand, four hundred forty".