40390030 has 16 divisors (see below), whose sum is σ = 72900720. Its totient is φ = 16111872.

The previous prime is 40390003. The next prime is 40390033. The reversal of 40390030 is 3009304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40390033) 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, 1539 + ... + 9118.

It is an arithmetic number, because the mean of its divisors is an integer number (4556295).

Almost surely, 2^40390030 is an apocalyptic number.

40390030 is a deficient number, since it is larger than the sum of its proper divisors (32510690).

40390030 is a wasteful number, since it uses less digits than its factorization.

40390030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11043.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 40390030 is about 6355.3150984039. The cubic root of 40390030 is about 343.1031657645.

Adding to 40390030 its reverse (3009304), we get a palindrome (43399334).

The spelling of 40390030 in words is "forty million, three hundred ninety thousand, thirty".