39421980 has 144 divisors (see below), whose sum is σ = 136491264. Its totient is φ = 9123840.

The previous prime is 39421939. The next prime is 39421999. The reversal of 39421980 is 8912493.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39285 + ... + 40275.

It is an arithmetic number, because the mean of its divisors is an integer number (947856).

Almost surely, 2^39421980 is an apocalyptic number.

39421980 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39421980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68245632).

39421980 is an abundant number, since it is smaller than the sum of its proper divisors (97069284).

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

39421980 is a wasteful number, since it uses less digits than its factorization.

39421980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036 (or 1031 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 39421980 is about 6278.6925390562. The cubic root of 39421980 is about 340.3398562527.

It can be divided in two parts, 39421 and 980, that added together give a square (40401 = 201²).

The spelling of 39421980 in words is "thirty-nine million, four hundred twenty-one thousand, nine hundred eighty".