406673520 has 80 divisors (see below), whose sum is σ = 1375304832. Its totient is φ = 98586880.

The previous prime is 406673503. The next prime is 406673521. The reversal of 406673520 is 25376604.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406673521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74382 + ... + 79661.

Almost surely, 2^406673520 is an apocalyptic number.

406673520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

406673520 is an abundant number, since it is smaller than the sum of its proper divisors (968631312).

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

406673520 is a wasteful number, since it uses less digits than its factorization.

406673520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154070 (or 154064 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 406673520 is about 20166.1478721148. The cubic root of 406673520 is about 740.8812972214.

The spelling of 406673520 in words is "four hundred six million, six hundred seventy-three thousand, five hundred twenty".