773971240 has 128 divisors (see below), whose sum is σ = 2118493440. Its totient is φ = 248426496.

The previous prime is 773971201. The next prime is 773971241. The reversal of 773971240 is 42179377.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 773971193 and 773971202.

It is not an unprimeable number, because it can be changed into a prime (773971241) 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, 1318227 + ... + 1318813.

It is an arithmetic number, because the mean of its divisors is an integer number (16550730).

Almost surely, 2^773971240 is an apocalyptic number.

773971240 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 773971240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1059246720).

773971240 is an abundant number, since it is smaller than the sum of its proper divisors (1344522200).

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

773971240 is a wasteful number, since it uses less digits than its factorization.

773971240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899 (or 895 counting only the distinct ones).

The product of its (nonzero) digits is 74088, while the sum is 40.

The square root of 773971240 is about 27820.3386032593. The cubic root of 773971240 is about 918.1386594930.

The spelling of 773971240 in words is "seven hundred seventy-three million, nine hundred seventy-one thousand, two hundred forty".