1872730 has 8 divisors (see below), whose sum is σ = 3370932. Its totient is φ = 749088.

The previous prime is 1872727. The next prime is 1872743. The reversal of 1872730 is 372781.

1872730 = T₈₆₃ + T₈₆₄ + ... + T₈₆₇.

1872730 = 610² + 611² + ... + 614².

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1580049 + 292681 = 1257^2 + 541^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 93627 + ... + 93646.

2^1872730 is an apocalyptic number.

1872730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1872730 is a deficient number, since it is larger than the sum of its proper divisors (1498202).

1872730 is a wasteful number, since it uses less digits than its factorization.

1872730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187280.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 1872730 is about 1368.4772559308. The cubic root of 1872730 is about 123.2608209418.

The spelling of 1872730 in words is "one million, eight hundred seventy-two thousand, seven hundred thirty".