672617478 has 64 divisors (see below), whose sum is σ = 1583511552. Its totient is φ = 188490240.

The previous prime is 672617459. The next prime is 672617483. The reversal of 672617478 is 874716276.

It is a super-2 number, since 2×672617478² = 904828543422160968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32925 + ... + 49287.

It is an arithmetic number, because the mean of its divisors is an integer number (24742368).

Almost surely, 2^672617478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 672617478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (791755776).

672617478 is an abundant number, since it is smaller than the sum of its proper divisors (910894074).

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

672617478 is a wasteful number, since it uses less digits than its factorization.

672617478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16429.

The product of its digits is 790272, while the sum is 48.

The square root of 672617478 is about 25934.8699244858. The cubic root of 672617478 is about 876.1720252850.

The spelling of 672617478 in words is "six hundred seventy-two million, six hundred seventeen thousand, four hundred seventy-eight".