39040224 has 48 divisors (see below), whose sum is σ = 104427792. Its totient is φ = 12766208.

The previous prime is 39040219. The next prime is 39040229. The reversal of 39040224 is 42204093.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (39040219) and next prime (39040229).

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 39040194 and 39040203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39040229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1252 + ... + 8924.

It is an arithmetic number, because the mean of its divisors is an integer number (2175579).

Almost surely, 2^39040224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39040224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52213896).

39040224 is an abundant number, since it is smaller than the sum of its proper divisors (65387568).

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

39040224 is a wasteful number, since it uses less digits than its factorization.

39040224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7739 (or 7731 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 39040224 is about 6248.2176658628. The cubic root of 39040224 is about 339.2376923523.

The spelling of 39040224 in words is "thirty-nine million, forty thousand, two hundred twenty-four".