612491040 has 144 divisors (see below), whose sum is σ = 2388754368. Its totient is φ = 139995648.

The previous prime is 612491027. The next prime is 612491041. The reversal of 612491040 is 40194216.

612491040 is a `hidden beast` number, since 612 + 4 + 9 + 1 + 0 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a junction number, because it is equal to n+sod(n) for n = 612490995 and 612491013.

It is not an unprimeable number, because it can be changed into a prime (612491041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20302 + ... + 40461.

It is an arithmetic number, because the mean of its divisors is an integer number (16588572).

Almost surely, 2^612491040 is an apocalyptic number.

612491040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

612491040 is an abundant number, since it is smaller than the sum of its proper divisors (1776263328).

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

612491040 is a wasteful number, since it uses less digits than its factorization.

612491040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60791 (or 60780 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 612491040 is about 24748.5563215312. The cubic root of 612491040 is about 849.2454849978.

The spelling of 612491040 in words is "six hundred twelve million, four hundred ninety-one thousand, forty".