31489902 has 12 divisors (see below), whose sum is σ = 68228160. Its totient is φ = 10496628.

The previous prime is 31489901. The next prime is 31489919. The reversal of 31489902 is 20998413.

It is a super-2 number, since 2×31489902² = 1983227855939208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31489901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 874702 + ... + 874737.

It is an arithmetic number, because the mean of its divisors is an integer number (5685680).

Almost surely, 2^31489902 is an apocalyptic number.

31489902 is an abundant number, since it is smaller than the sum of its proper divisors (36738258).

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

31489902 is a wasteful number, since it uses less digits than its factorization.

31489902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1749447 (or 1749444 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 31489902 is about 5611.5864067125. The cubic root of 31489902 is about 315.7842288690.

The spelling of 31489902 in words is "thirty-one million, four hundred eighty-nine thousand, nine hundred two".