123378730 has 16 divisors (see below), whose sum is σ = 222288264. Its totient is φ = 49305600.

The previous prime is 123378727. The next prime is 123378743. The reversal of 123378730 is 37873321.

It can be written as a sum of positive squares in 4 ways, for example, as 38056561 + 85322169 = 6169^2 + 9237^2 .

It is a super-2 number, since 2×123378730² = 30444622032825800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6874 + ... + 17146.

Almost surely, 2^123378730 is an apocalyptic number.

123378730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123378730 is a deficient number, since it is larger than the sum of its proper divisors (98909534).

123378730 is a wasteful number, since it uses less digits than its factorization.

123378730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11481.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 123378730 is about 11107.5978501204. The cubic root of 123378730 is about 497.8288928999.

The spelling of 123378730 in words is "one hundred twenty-three million, three hundred seventy-eight thousand, seven hundred thirty".