340072581 has 4 divisors (see below), whose sum is σ = 453430112. Its totient is φ = 226715052.

The previous prime is 340072561. The next prime is 340072597. The reversal of 340072581 is 185270043.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 340072581 - 2⁶ = 340072517 is a prime.

It is a super-2 number, since 2×340072581² = 231298720696003122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340072561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56678761 + ... + 56678766.

It is an arithmetic number, because the mean of its divisors is an integer number (113357528).

Almost surely, 2^340072581 is an apocalyptic number.

It is an amenable number.

340072581 is a deficient number, since it is larger than the sum of its proper divisors (113357531).

340072581 is a wasteful number, since it uses less digits than its factorization.

340072581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113357530.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 340072581 is about 18441.0569382560. The cubic root of 340072581 is about 698.0028660019.

The spelling of 340072581 in words is "three hundred forty million, seventy-two thousand, five hundred eighty-one".