39742780 has 96 divisors (see below), whose sum is σ = 105380352. Its totient is φ = 12230400.

The previous prime is 39742763. The next prime is 39742783. The reversal of 39742780 is 8724793.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39742783) 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, 201642 + ... + 201838.

It is an arithmetic number, because the mean of its divisors is an integer number (1097712).

Almost surely, 2^39742780 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 39742780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52690176).

39742780 is an abundant number, since it is smaller than the sum of its proper divisors (65637572).

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

39742780 is a wasteful number, since it uses less digits than its factorization.

39742780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355 (or 353 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 39742780 is about 6304.1874972117. The cubic root of 39742780 is about 341.2605456808.

The spelling of 39742780 in words is "thirty-nine million, seven hundred forty-two thousand, seven hundred eighty".