368391690 has 48 divisors (see below), whose sum is σ = 999468288. Its totient is φ = 93966048.

The previous prime is 368391671. The next prime is 368391697. The reversal of 368391690 is 96193863.

It is a super-2 number, since 2×368391690² = 271424874522112200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (368391697) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86914 + ... + 91053.

It is an arithmetic number, because the mean of its divisors is an integer number (20822256).

Almost surely, 2^368391690 is an apocalyptic number.

368391690 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

368391690 is an abundant number, since it is smaller than the sum of its proper divisors (631076598).

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

368391690 is a wasteful number, since it uses less digits than its factorization.

368391690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178003 (or 178000 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 368391690 is about 19193.5325044662. The cubic root of 368391690 is about 716.8637311569.

The spelling of 368391690 in words is "three hundred sixty-eight million, three hundred ninety-one thousand, six hundred ninety".