340021437 has 48 divisors (see below), whose sum is σ = 564250752. Its totient is φ = 180956160.

The previous prime is 340021411. The next prime is 340021439. The reversal of 340021437 is 734120043.

It is not a de Polignac number, because 340021437 - 2¹² = 340017341 is a prime.

It is a super-2 number, since 2×340021437² = 231229155239089938, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340021439) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 256737 + ... + 258057.

It is an arithmetic number, because the mean of its divisors is an integer number (11755224).

Almost surely, 2^340021437 is an apocalyptic number.

It is an amenable number.

340021437 is a deficient number, since it is larger than the sum of its proper divisors (224229315).

340021437 is a wasteful number, since it uses less digits than its factorization.

340021437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1458 (or 1451 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 340021437 is about 18439.6701977015. The cubic root of 340021437 is about 697.9678730325.

The spelling of 340021437 in words is "three hundred forty million, twenty-one thousand, four hundred thirty-seven".