406624647 has 24 divisors (see below), whose sum is σ = 640459008.
Its totient is φ = 227479200.
The previous prime is 406624633. The next prime is 406624651. The reversal of 406624647 is 746426604.
It is not a de Polignac number, because 406624647 - 211 = 406622599 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (39).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (406624607) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30879 + ... + 42032.
It is an arithmetic number, because the mean of its divisors is an integer number (26685792).
Almost surely, 2406624647 is an apocalyptic number.
406624647 is a deficient number, since it is larger than the sum of its proper divisors (233834361).
406624647 is a wasteful number, since it uses less digits than its factorization.
406624647 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 72951 (or 72938 counting only the distinct ones).
The product of its (nonzero) digits is 193536, while the sum is 39.
The square root of 406624647 is about 20164.9360772604.
The cubic root of 406624647 is about 740.8516169492.
The spelling of 406624647 in words is "four hundred six million, six hundred twenty-four thousand, six hundred forty-seven".