840694730 has 16 divisors (see below), whose sum is σ = 1513620864. Its totient is φ = 336195600.

The previous prime is 840694721. The next prime is 840694733. The reversal of 840694730 is 37496048.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (840694733) 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, 48755 + ... + 63705.

It is an arithmetic number, because the mean of its divisors is an integer number (94601304).

Almost surely, 2^840694730 is an apocalyptic number.

840694730 is a deficient number, since it is larger than the sum of its proper divisors (672926134).

840694730 is a wasteful number, since it uses less digits than its factorization.

840694730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20581.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 840694730 is about 28994.7362464293. The cubic root of 840694730 is about 943.7988453002.

The spelling of 840694730 in words is "eight hundred forty million, six hundred ninety-four thousand, seven hundred thirty".