612278436 has 48 divisors (see below), whose sum is σ = 1781176320. Its totient is φ = 159033120.

The previous prime is 612278431. The next prime is 612278441. The reversal of 612278436 is 634872216.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (612278431) and next prime (612278441).

It is a junction number, because it is equal to n+sod(n) for n = 612278394 and 612278403.

It is not an unprimeable number, because it can be changed into a prime (612278431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 330396 + ... + 332243.

It is an arithmetic number, because the mean of its divisors is an integer number (37107840).

Almost surely, 2^612278436 is an apocalyptic number.

612278436 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

612278436 is an abundant number, since it is smaller than the sum of its proper divisors (1168897884).

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

612278436 is a wasteful number, since it uses less digits than its factorization.

612278436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662664 (or 662662 counting only the distinct ones).

The product of its digits is 96768, while the sum is 39.

The square root of 612278436 is about 24744.2606678801. The cubic root of 612278436 is about 849.1472120598.

The spelling of 612278436 in words is "six hundred twelve million, two hundred seventy-eight thousand, four hundred thirty-six".