39935490 has 64 divisors (see below), whose sum is σ = 111801600. Its totient is φ = 9125760.

The previous prime is 39935479. The next prime is 39935491. The reversal of 39935490 is 9453993.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (39935491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8350 + ... + 12230.

It is an arithmetic number, because the mean of its divisors is an integer number (1746900).

Almost surely, 2^39935490 is an apocalyptic number.

39935490 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 39935490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55900800).

39935490 is an abundant number, since it is smaller than the sum of its proper divisors (71866110).

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

39935490 is a wasteful number, since it uses less digits than its factorization.

39935490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3912 (or 3898 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 42.

The square root of 39935490 is about 6319.4532991391. The cubic root of 39935490 is about 341.8112394976.

The spelling of 39935490 in words is "thirty-nine million, nine hundred thirty-five thousand, four hundred ninety".