672647540 has 12 divisors (see below), whose sum is σ = 1412559876. Its totient is φ = 269059008.

The previous prime is 672647497. The next prime is 672647587. The reversal of 672647540 is 45746276.

It can be written as a sum of positive squares in 2 ways, for example, as 109914256 + 562733284 = 10484^2 + 23722^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16816169 + ... + 16816208.

It is an arithmetic number, because the mean of its divisors is an integer number (117713323).

Almost surely, 2^672647540 is an apocalyptic number.

It is an amenable number.

672647540 is an abundant number, since it is smaller than the sum of its proper divisors (739912336).

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

672647540 is a wasteful number, since it uses less digits than its factorization.

672647540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33632386 (or 33632384 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 41.

The square root of 672647540 is about 25935.4494852123. The cubic root of 672647540 is about 876.1850783163.

The spelling of 672647540 in words is "six hundred seventy-two million, six hundred forty-seven thousand, five hundred forty".