31490049 has 16 divisors (see below), whose sum is σ = 44596800. Its totient is φ = 19708416.

The previous prime is 31490023. The next prime is 31490057. The reversal of 31490049 is 94009413.

It is not a de Polignac number, because 31490049 - 2¹² = 31485953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31489998 and 31490025.

It is not an unprimeable number, because it can be changed into a prime (31490089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3997 + ... + 8885.

It is an arithmetic number, because the mean of its divisors is an integer number (2787300).

It is a Proth number, since it is equal to 961 ⋅ 2¹⁵ + 1 and 961 < 2¹⁵.

Almost surely, 2^31490049 is an apocalyptic number.

It is an amenable number.

31490049 is a deficient number, since it is larger than the sum of its proper divisors (13106751).

31490049 is a wasteful number, since it uses less digits than its factorization.

31490049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5024.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 31490049 is about 5611.5995045976. The cubic root of 31490049 is about 315.7847202457.

The spelling of 31490049 in words is "thirty-one million, four hundred ninety thousand, forty-nine".