123373890 has 24 divisors (see below), whose sum is σ = 320772348. Its totient is φ = 32899680.

The previous prime is 123373883. The next prime is 123373907. The reversal of 123373890 is 98373321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 123010281 + 363609 = 11091^2 + 603^2 .

It is a super-2 number, since 2×123373890² = 30442233467464200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 685321 + ... + 685500.

Almost surely, 2^123373890 is an apocalyptic number.

123373890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123373890 is an abundant number, since it is smaller than the sum of its proper divisors (197398458).

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

123373890 is a wasteful number, since it uses less digits than its factorization.

123373890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370834 (or 1370831 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 123373890 is about 11107.3799790950. The cubic root of 123373890 is about 497.8223830707.

The spelling of 123373890 in words is "one hundred twenty-three million, three hundred seventy-three thousand, eight hundred ninety".