40029320 has 32 divisors (see below), whose sum is σ = 90250200. Its totient is φ = 15979008.

The previous prime is 40029313. The next prime is 40029343. The reversal of 40029320 is 2392004.

It can be written as a sum of positive squares in 4 ways, for example, as 39513796 + 515524 = 6286^2 + 718^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 40029292 and 40029301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31742 + ... + 32978.

Almost surely, 2^40029320 is an apocalyptic number.

40029320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40029320 is an abundant number, since it is smaller than the sum of its proper divisors (50220880).

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

40029320 is a wasteful number, since it uses less digits than its factorization.

40029320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2057 (or 2053 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 40029320 is about 6326.8728452530. The cubic root of 40029320 is about 342.0787297515.

The spelling of 40029320 in words is "forty million, twenty-nine thousand, three hundred twenty".