399061240 has 32 divisors (see below), whose sum is σ = 898938000. Its totient is φ = 159437824.

The previous prime is 399061219. The next prime is 399061249. The reversal of 399061240 is 42160993.

It is a super-3 number, since 3×399061240³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 399061196 and 399061205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399061249) 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, 31791 + ... + 42529.

Almost surely, 2^399061240 is an apocalyptic number.

It is an amenable number.

399061240 is an abundant number, since it is smaller than the sum of its proper divisors (499876760).

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

399061240 is a wasteful number, since it uses less digits than its factorization.

399061240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11679 (or 11675 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 399061240 is about 19976.5172139690. The cubic root of 399061240 is about 736.2294446504.

The spelling of 399061240 in words is "three hundred ninety-nine million, sixty-one thousand, two hundred forty".