3721261500 has 240 divisors, whose sum is σ = 13245968736. Its totient is φ = 902016000.

The previous prime is 3721261463. The next prime is 3721261553. The reversal of 3721261500 is 51621273.

It is a happy number.

3721261500 is a `hidden beast` number, since 37 + 2 + 12 + 615 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 441324 + ... + 449676.

Almost surely, 2^3721261500 is an apocalyptic number.

3721261500 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 3721261500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6622984368).

3721261500 is an abundant number, since it is smaller than the sum of its proper divisors (9524707236).

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

3721261500 is a wasteful number, since it uses less digits than its factorization.

3721261500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8395 (or 8374 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 3721261500 is about 61002.1434049657. The cubic root of 3721261500 is about 1549.6373067439.

Adding to 3721261500 its reverse (51621273), we get a palindrome (3772882773).

The spelling of 3721261500 in words is "three billion, seven hundred twenty-one million, two hundred sixty-one thousand, five hundred".