3721451904 has 128 divisors (see below), whose sum is σ = 11170224000. Its totient is φ = 1219392000.

The previous prime is 3721451887. The next prime is 3721451977. The reversal of 3721451904 is 4091541273.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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 15 ways as a sum of consecutive naturals, for example, 194779 + ... + 213029.

It is an arithmetic number, because the mean of its divisors is an integer number (87267375).

Almost surely, 2^3721451904 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 3721451904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5585112000).

3721451904 is an abundant number, since it is smaller than the sum of its proper divisors (7448772096).

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

3721451904 is a wasteful number, since it uses less digits than its factorization.

3721451904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18333 (or 18315 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 3721451904 is about 61003.7040186905. The cubic root of 3721451904 is about 1549.6637361425.

It can be divided in two parts, 3721 and 451904, that added together give a square (455625 = 675²).

The spelling of 3721451904 in words is "three billion, seven hundred twenty-one million, four hundred fifty-one thousand, nine hundred four".