15740730 has 40 divisors (see below), whose sum is σ = 42327252. Its totient is φ = 4197312.

The previous prime is 15740729. The next prime is 15740737. The reversal of 15740730 is 3704751.

It can be written as a sum of positive squares in 2 ways, for example, as 14220441 + 1520289 = 3771^2 + 1233^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 15740694 and 15740703.

It is not an unprimeable number, because it can be changed into a prime (15740737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8907 + ... + 10526.

Almost surely, 2^15740730 is an apocalyptic number.

15740730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15740730 is an abundant number, since it is smaller than the sum of its proper divisors (26586522).

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

15740730 is a wasteful number, since it uses less digits than its factorization.

15740730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19452 (or 19443 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 15740730 is about 3967.4588844750. The cubic root of 15740730 is about 250.6157090313.

The spelling of 15740730 in words is "fifteen million, seven hundred forty thousand, seven hundred thirty".