36388640 has 48 divisors (see below), whose sum is σ = 86329152. Its totient is φ = 14494464.

The previous prime is 36388633. The next prime is 36388643. The reversal of 36388640 is 4688363.

It is a junction number, because it is equal to n+sod(n) for n = 36388594 and 36388603.

It is not an unprimeable number, because it can be changed into a prime (36388643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74477 + ... + 74963.

It is an arithmetic number, because the mean of its divisors is an integer number (1798524).

Almost surely, 2^36388640 is an apocalyptic number.

It is an amenable number.

36388640 is an abundant number, since it is smaller than the sum of its proper divisors (49940512).

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

36388640 is a wasteful number, since it uses less digits than its factorization.

36388640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969 (or 961 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 36388640 is about 6032.2997273014. The cubic root of 36388640 is about 331.3766792093.

The spelling of 36388640 in words is "thirty-six million, three hundred eighty-eight thousand, six hundred forty".