123072490 has 16 divisors (see below), whose sum is σ = 221672448. Its totient is φ = 49197456.

The previous prime is 123072479. The next prime is 123072527. The reversal of 123072490 is 94270321.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18559 + ... + 24301.

It is an arithmetic number, because the mean of its divisors is an integer number (13854528).

Almost surely, 2^123072490 is an apocalyptic number.

123072490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123072490 is a deficient number, since it is larger than the sum of its proper divisors (98599958).

123072490 is a wasteful number, since it uses less digits than its factorization.

123072490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7893.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 123072490 is about 11093.8041266285. The cubic root of 123072490 is about 497.4166623872.

The spelling of 123072490 in words is "one hundred twenty-three million, seventy-two thousand, four hundred ninety".