1340824731 has 8 divisors (see below), whose sum is σ = 1892929104. Its totient is φ = 841301760.

The previous prime is 1340824717. The next prime is 1340824757. The reversal of 1340824731 is 1374280431.

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

It is not a de Polignac number, because 1340824731 - 2¹¹ = 1340822683 is a prime.

It is a super-2 number, since 2×1340824731² = 3595621918522444722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1340824692 and 1340824701.

It is not an unprimeable number, because it can be changed into a prime (1340824711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13145290 + ... + 13145391.

It is an arithmetic number, because the mean of its divisors is an integer number (236616138).

Almost surely, 2^1340824731 is an apocalyptic number.

1340824731 is a deficient number, since it is larger than the sum of its proper divisors (552104373).

1340824731 is a wasteful number, since it uses less digits than its factorization.

1340824731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26290701.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 1340824731 is about 36617.2736696767. The cubic root of 1340824731 is about 1102.6999052363.

The spelling of 1340824731 in words is "one billion, three hundred forty million, eight hundred twenty-four thousand, seven hundred thirty-one".