978772605 has 32 divisors (see below), whose sum is σ = 1587600000. Its totient is φ = 514854912.

The previous prime is 978772547. The next prime is 978772607. The reversal of 978772605 is 506277879.

It is not a de Polignac number, because 978772605 - 2⁷ = 978772477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978772607) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 783021 + ... + 784269.

It is an arithmetic number, because the mean of its divisors is an integer number (49612500).

Almost surely, 2^978772605 is an apocalyptic number.

It is an amenable number.

978772605 is a deficient number, since it is larger than the sum of its proper divisors (608827395).

978772605 is a wasteful number, since it uses less digits than its factorization.

978772605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1933.

The product of its (nonzero) digits is 1481760, while the sum is 51.

The square root of 978772605 is about 31285.3416954330. The cubic root of 978772605 is about 992.8735358176.

The spelling of 978772605 in words is "nine hundred seventy-eight million, seven hundred seventy-two thousand, six hundred five".