It is a tau number, because it is divible by the number of its divisors (40).
It is an unprimeable number.
Almost surely, 23900720 is an apocalyptic number.
3900720 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 pseudoperfect number, because it is the sum of a subset of its proper divisors.
3900720 is a wasteful number, since it uses less digits than its factorization.
3900720 is an evil number, because the sum of its binary digits is even.
The square root of 3900720 is about 1975.0240504865. The cubic root of 3900720 is about 157.4157775958.
The spelling of 3900720 in words is "three million, nine hundred thousand, seven hundred twenty".