72090490 has 16 divisors (see below), whose sum is σ = 130483080. Its totient is φ = 28676160.

The previous prime is 72090457. The next prime is 72090509. The reversal of 72090490 is 9409027.

It can be written as a sum of positive squares in 4 ways, for example, as 53246209 + 18844281 = 7297^2 + 4341^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18105 + ... + 21724.

Almost surely, 2^72090490 is an apocalyptic number.

72090490 is a deficient number, since it is larger than the sum of its proper divisors (58392590).

72090490 is a wasteful number, since it uses less digits than its factorization.

72090490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40017.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 72090490 is about 8490.6118742998. The cubic root of 72090490 is about 416.1909757079.

The spelling of 72090490 in words is "seventy-two million, ninety thousand, four hundred ninety".