31415428 has 12 divisors (see below), whose sum is σ = 59974992. Its totient is φ = 14279720.

The previous prime is 31415407. The next prime is 31415437. The reversal of 31415428 is 82451413.

It is a junction number, because it is equal to n+sod(n) for n = 31415396 and 31415405.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356950 + ... + 357037.

It is an arithmetic number, because the mean of its divisors is an integer number (4997916).

Almost surely, 2^31415428 is an apocalyptic number.

It is an amenable number.

31415428 is a deficient number, since it is larger than the sum of its proper divisors (28559564).

31415428 is a wasteful number, since it uses less digits than its factorization.

31415428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714002 (or 714000 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

The square root of 31415428 is about 5604.9467437256. The cubic root of 31415428 is about 315.5350878486.

The spelling of 31415428 in words is "thirty-one million, four hundred fifteen thousand, four hundred twenty-eight".