981767864 has 48 divisors (see below), whose sum is σ = 2312444400. Its totient is φ = 382504320.

The previous prime is 981767863. The next prime is 981767909. The reversal of 981767864 is 468767189.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981767863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65669 + ... + 79220.

It is an arithmetic number, because the mean of its divisors is an integer number (48175925).

Almost surely, 2^981767864 is an apocalyptic number.

It is an amenable number.

981767864 is an abundant number, since it is smaller than the sum of its proper divisors (1330676536).

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

981767864 is a wasteful number, since it uses less digits than its factorization.

981767864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144924 (or 144909 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 56.

The square root of 981767864 is about 31333.1751343524. The cubic root of 981767864 is about 993.8853080844.

The spelling of 981767864 in words is "nine hundred eighty-one million, seven hundred sixty-seven thousand, eight hundred sixty-four".