861407340 has 48 divisors (see below), whose sum is σ = 2553822432. Its totient is φ = 216196096.

The previous prime is 861407311. The next prime is 861407341. The reversal of 861407340 is 43704168.

It is not an unprimeable number, because it can be changed into a prime (861407341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 421239 + ... + 423278.

It is an arithmetic number, because the mean of its divisors is an integer number (53204634).

Almost surely, 2^861407340 is an apocalyptic number.

It is an amenable number.

861407340 is an abundant number, since it is smaller than the sum of its proper divisors (1692415092).

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

861407340 is a wasteful number, since it uses less digits than its factorization.

861407340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844546 (or 844544 counting only the distinct ones).

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

The square root of 861407340 is about 29349.7417365128. The cubic root of 861407340 is about 951.4869935126.

The spelling of 861407340 in words is "eight hundred sixty-one million, four hundred seven thousand, three hundred forty".