406721532 has 48 divisors (see below), whose sum is σ = 1148394240. Its totient is φ = 109370112.

The previous prime is 406721521. The next prime is 406721533. The reversal of 406721532 is 235127604.

It is a self number, because there is not a number n which added to its sum of digits gives 406721532.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406721533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140982 + ... + 143837.

It is an arithmetic number, because the mean of its divisors is an integer number (23924880).

Almost surely, 2^406721532 is an apocalyptic number.

406721532 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

406721532 is an abundant number, since it is smaller than the sum of its proper divisors (741672708).

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

406721532 is a wasteful number, since it uses less digits than its factorization.

406721532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284850 (or 284848 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 406721532 is about 20167.3382477708. The cubic root of 406721532 is about 740.9104522981.

It can be divided in two parts, 406721 and 532, that added together give a triangular number (407253 = T₉₀₂).

The spelling of 406721532 in words is "four hundred six million, seven hundred twenty-one thousand, five hundred thirty-two".