39873870 has 96 divisors (see below), whose sum is σ = 109680480. Its totient is φ = 10419840.

The previous prime is 39873863. The next prime is 39873877. The reversal of 39873870 is 7837893.

It is an interprime number because it is at equal distance from previous prime (39873863) and next prime (39873877).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39873877) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 148096 + ... + 148364.

It is an arithmetic number, because the mean of its divisors is an integer number (1142505).

Almost surely, 2^39873870 is an apocalyptic number.

39873870 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 39873870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54840240).

39873870 is an abundant number, since it is smaller than the sum of its proper divisors (69806610).

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

39873870 is a wasteful number, since it uses less digits than its factorization.

39873870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 39873870 is about 6314.5759952668. The cubic root of 39873870 is about 341.6353454003.

The spelling of 39873870 in words is "thirty-nine million, eight hundred seventy-three thousand, eight hundred seventy".