612400380 has 48 divisors (see below), whose sum is σ = 1721094144. Its totient is φ = 162699840.

The previous prime is 612400379. The next prime is 612400391. The reversal of 612400380 is 83004216.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 612400380.

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, 2572 + ... + 35091.

It is an arithmetic number, because the mean of its divisors is an integer number (35856128).

Almost surely, 2^612400380 is an apocalyptic number.

612400380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

612400380 is an abundant number, since it is smaller than the sum of its proper divisors (1108693764).

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

612400380 is a wasteful number, since it uses less digits than its factorization.

612400380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37946 (or 37944 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 612400380 is about 24746.7246317568. The cubic root of 612400380 is about 849.2035815849.

Adding to 612400380 its reverse (83004216), we get a palindrome (695404596).

The spelling of 612400380 in words is "six hundred twelve million, four hundred thousand, three hundred eighty".