31402030 has 16 divisors (see below), whose sum is σ = 61662384. Its totient is φ = 11418880.

The previous prime is 31402027. The next prime is 31402037. The reversal of 31402030 is 3020413.

It is a self number, because there is not a number n which added to its sum of digits gives 31402030.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31402037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142627 + ... + 142846.

It is an arithmetic number, because the mean of its divisors is an integer number (3853899).

Almost surely, 2^31402030 is an apocalyptic number.

31402030 is a deficient number, since it is larger than the sum of its proper divisors (30260354).

31402030 is a wasteful number, since it uses less digits than its factorization.

31402030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285491.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 31402030 is about 5603.7514220386. The cubic root of 31402030 is about 315.4902251755.

Adding to 31402030 its reverse (3020413), we get a palindrome (34422443).

The spelling of 31402030 in words is "thirty-one million, four hundred two thousand, thirty".