312771540 has 48 divisors (see below), whose sum is σ = 921856320. Its totient is φ = 79015680.

The previous prime is 312771527. The next prime is 312771601. The reversal of 312771540 is 45177213.

312771540 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 = 312771498 and 312771507.

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, 136041 + ... + 138320.

It is an arithmetic number, because the mean of its divisors is an integer number (19205340).

Almost surely, 2^312771540 is an apocalyptic number.

312771540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

312771540 is an abundant number, since it is smaller than the sum of its proper divisors (609084780).

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

312771540 is a wasteful number, since it uses less digits than its factorization.

312771540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274392 (or 274390 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 312771540 is about 17685.3481729934. The cubic root of 312771540 is about 678.8009000353.

The spelling of 312771540 in words is "three hundred twelve million, seven hundred seventy-one thousand, five hundred forty".