774129972 has 96 divisors (see below), whose sum is σ = 2260177920. Its totient is φ = 200344320.

The previous prime is 774129971. The next prime is 774130001. The reversal of 774129972 is 279921477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (774129971) 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, 282304 + ... + 285032.

It is an arithmetic number, because the mean of its divisors is an integer number (23543520).

Almost surely, 2^774129972 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 774129972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1130088960).

774129972 is an abundant number, since it is smaller than the sum of its proper divisors (1486047948).

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

774129972 is a wasteful number, since it uses less digits than its factorization.

774129972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3061 (or 3059 counting only the distinct ones).

The product of its digits is 444528, while the sum is 48.

The square root of 774129972 is about 27823.1912619671. The cubic root of 774129972 is about 918.2014215252.

The spelling of 774129972 in words is "seven hundred seventy-four million, one hundred twenty-nine thousand, nine hundred seventy-two".