632778740 has 48 divisors (see below), whose sum is σ = 1463241024. Its totient is φ = 227942400.

The previous prime is 632778739. The next prime is 632778763. The reversal of 632778740 is 47877236.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 632778691 and 632778700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10100 + ... + 36980.

It is an arithmetic number, because the mean of its divisors is an integer number (30484188).

Almost surely, 2^632778740 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 632778740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (731620512).

632778740 is an abundant number, since it is smaller than the sum of its proper divisors (830462284).

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

632778740 is a wasteful number, since it uses less digits than its factorization.

632778740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27008 (or 27006 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 44.

The square root of 632778740 is about 25155.0937187680. The cubic root of 632778740 is about 858.5204142646.

The spelling of 632778740 in words is "six hundred thirty-two million, seven hundred seventy-eight thousand, seven hundred forty".