39478140 has 72 divisors (see below), whose sum is σ = 128969568. Its totient is φ = 9717120.

The previous prime is 39478129. The next prime is 39478147. The reversal of 39478140 is 4187493.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 39478095 and 39478104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39478147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6096 + ... + 10775.

It is an arithmetic number, because the mean of its divisors is an integer number (1791244).

Almost surely, 2^39478140 is an apocalyptic number.

39478140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

39478140 is an abundant number, since it is smaller than the sum of its proper divisors (89491428).

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

39478140 is a wasteful number, since it uses less digits than its factorization.

39478140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16899 (or 16894 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 39478140 is about 6283.1632160879. The cubic root of 39478140 is about 340.5013940313.

The spelling of 39478140 in words is "thirty-nine million, four hundred seventy-eight thousand, one hundred forty".