978077738 has 16 divisors (see below), whose sum is σ = 1616340960. Its totient is φ = 440178000.

The previous prime is 978077731. The next prime is 978077743. The reversal of 978077738 is 837770879.

It is not an unprimeable number, because it can be changed into a prime (978077731) 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, 217868 + ... + 222311.

It is an arithmetic number, because the mean of its divisors is an integer number (101021310).

Almost surely, 2^978077738 is an apocalyptic number.

978077738 is a deficient number, since it is larger than the sum of its proper divisors (638263222).

978077738 is a wasteful number, since it uses less digits than its factorization.

978077738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440293.

The product of its (nonzero) digits is 4148928, while the sum is 56.

The square root of 978077738 is about 31274.2344110931. The cubic root of 978077738 is about 992.6385209355.

The spelling of 978077738 in words is "nine hundred seventy-eight million, seventy-seven thousand, seven hundred thirty-eight".