672561340 has 48 divisors (see below), whose sum is σ = 1555231104. Its totient is φ = 242273600.

The previous prime is 672561313. The next prime is 672561353. The reversal of 672561340 is 43165276.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 672561296 and 672561305.

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, 9255 + ... + 37825.

It is an arithmetic number, because the mean of its divisors is an integer number (32400648).

Almost surely, 2^672561340 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 672561340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (777615552).

672561340 is an abundant number, since it is smaller than the sum of its proper divisors (882669764).

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

672561340 is a wasteful number, since it uses less digits than its factorization.

672561340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28698 (or 28696 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 672561340 is about 25933.7876138446. The cubic root of 672561340 is about 876.1476489169.

The spelling of 672561340 in words is "six hundred seventy-two million, five hundred sixty-one thousand, three hundred forty".