39490770 has 128 divisors (see below), whose sum is σ = 111310848. Its totient is φ = 8944320.

The previous prime is 39490769. The next prime is 39490771. The reversal of 39490770 is 7709493.

It is an interprime number because it is at equal distance from previous prime (39490769) and next prime (39490771).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39490771) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 918369 + ... + 918411.

It is an arithmetic number, because the mean of its divisors is an integer number (869616).

Almost surely, 2^39490770 is an apocalyptic number.

39490770 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 39490770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55655424).

39490770 is an abundant number, since it is smaller than the sum of its proper divisors (71820078).

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

39490770 is a wasteful number, since it uses less digits than its factorization.

39490770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 87 counting only the distinct ones).

The product of its (nonzero) digits is 47628, while the sum is 39.

The square root of 39490770 is about 6284.1682027139. The cubic root of 39490770 is about 340.5377016695.

The spelling of 39490770 in words is "thirty-nine million, four hundred ninety thousand, seven hundred seventy".