36691440 has 180 divisors, whose sum is σ = 126309624. Its totient is φ = 8808448.

The previous prime is 36691429. The next prime is 36691441. The reversal of 36691440 is 4419663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36691441) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1595269 + ... + 1595291.

Almost surely, 2^36691440 is an apocalyptic number.

36691440 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 36691440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63154812).

36691440 is an abundant number, since it is smaller than the sum of its proper divisors (89618184).

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

36691440 is a wasteful number, since it uses less digits than its factorization.

36691440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 36691440 is about 6057.3459534684. The cubic root of 36691440 is about 332.2933005928.

It can be divided in two parts, 366 and 91440, that added together give a triangular number (91806 = T₄₂₈).

The spelling of 36691440 in words is "thirty-six million, six hundred ninety-one thousand, four hundred forty".