31438154 has 24 divisors (see below), whose sum is σ = 53193024. Its totient is φ = 13819800.

The previous prime is 31438153. The next prime is 31438157. The reversal of 31438154 is 45183413.

It is not an unprimeable number, because it can be changed into a prime (31438153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20399 + ... + 21885.

It is an arithmetic number, because the mean of its divisors is an integer number (2216376).

Almost surely, 2^31438154 is an apocalyptic number.

31438154 is a deficient number, since it is larger than the sum of its proper divisors (21754870).

31438154 is a wasteful number, since it uses less digits than its factorization.

31438154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562 (or 1531 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 31438154 is about 5606.9736935356. The cubic root of 31438154 is about 315.6111558023.

The spelling of 31438154 in words is "thirty-one million, four hundred thirty-eight thousand, one hundred fifty-four".