39788540 has 48 divisors (see below), whose sum is σ = 92292480. Its totient is φ = 14287680.

The previous prime is 39788533. The next prime is 39788549. The reversal of 39788540 is 4588793.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 39788491 and 39788500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39788549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17171 + ... + 19349.

It is an arithmetic number, because the mean of its divisors is an integer number (1922760).

Almost surely, 2^39788540 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 39788540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46146240).

39788540 is an abundant number, since it is smaller than the sum of its proper divisors (52503940).

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

39788540 is a wasteful number, since it uses less digits than its factorization.

39788540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2282 (or 2280 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 39788540 is about 6307.8157867839. The cubic root of 39788540 is about 341.3914717084.

The spelling of 39788540 in words is "thirty-nine million, seven hundred eighty-eight thousand, five hundred forty".