33722601990 has 512 divisors, whose sum is σ = 110744174592. Its totient is φ = 6412032000.

The previous prime is 33722601989. The next prime is 33722602013. The reversal of 33722601990 is 9910622733.

It is a super-2 number, since 2×33722601990² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 223328415 + ... + 223328565.

It is an arithmetic number, because the mean of its divisors is an integer number (216297216).

Almost surely, 2^33722601990 is an apocalyptic number.

33722601990 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 33722601990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55372087296).

33722601990 is an abundant number, since it is smaller than the sum of its proper divisors (77021572602).

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

33722601990 is a wasteful number, since it uses less digits than its factorization.

33722601990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 42.

The spelling of 33722601990 in words is "thirty-three billion, seven hundred twenty-two million, six hundred one thousand, nine hundred ninety".