31402634 has 4 divisors (see below), whose sum is σ = 47103954. Its totient is φ = 15701316.

The previous prime is 31402633. The next prime is 31402643. The reversal of 31402634 is 43620413.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43620413 = 89 ⋅490117.

It can be written as a sum of positive squares in only one way, i.e., 31393609 + 9025 = 5603^2 + 95^2 .

It is a super-2 number, since 2×31402634² = 1972250844275912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31402633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7850657 + ... + 7850660.

Almost surely, 2^31402634 is an apocalyptic number.

31402634 is a deficient number, since it is larger than the sum of its proper divisors (15701320).

31402634 is a wasteful number, since it uses less digits than its factorization.

31402634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15701319.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 31402634 is about 5603.8053142485. The cubic root of 31402634 is about 315.4922479202.

The spelling of 31402634 in words is "thirty-one million, four hundred two thousand, six hundred thirty-four".