31437428 has 12 divisors (see below), whose sum is σ = 60016992. Its totient is φ = 14289720.

The previous prime is 31437401. The next prime is 31437431. The reversal of 31437428 is 82473413.

It is a junction number, because it is equal to n+sod(n) for n = 31437394 and 31437403.

It is a congruent number.

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, 357200 + ... + 357287.

It is an arithmetic number, because the mean of its divisors is an integer number (5001416).

Almost surely, 2^31437428 is an apocalyptic number.

It is an amenable number.

31437428 is a deficient number, since it is larger than the sum of its proper divisors (28579564).

31437428 is a wasteful number, since it uses less digits than its factorization.

31437428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714502 (or 714500 counting only the distinct ones).

The product of its digits is 16128, while the sum is 32.

The square root of 31437428 is about 5606.9089523551. The cubic root of 31437428 is about 315.6087263184.

The spelling of 31437428 in words is "thirty-one million, four hundred thirty-seven thousand, four hundred twenty-eight".