31428044 has 6 divisors (see below), whose sum is σ = 54999084. Its totient is φ = 15714020.

The previous prime is 31428043. The next prime is 31428049. The reversal of 31428044 is 44082413.

It is not an unprimeable number, because it can be changed into a prime (31428041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3928502 + ... + 3928509.

It is an arithmetic number, because the mean of its divisors is an integer number (9166514).

Almost surely, 2^31428044 is an apocalyptic number.

It is an amenable number.

31428044 is a deficient number, since it is larger than the sum of its proper divisors (23571040).

31428044 is a wasteful number, since it uses less digits than its factorization.

31428044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7857015 (or 7857013 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 31428044 is about 5606.0720651808. The cubic root of 31428044 is about 315.5773203669.

The spelling of 31428044 in words is "thirty-one million, four hundred twenty-eight thousand, forty-four".