36400861 has 4 divisors (see below), whose sum is σ = 41600992. Its totient is φ = 31200732.

The previous prime is 36400853. The next prime is 36400883. The reversal of 36400861 is 16800463.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16800463 = 2113 ⋅7951.

It is a cyclic number.

It is not a de Polignac number, because 36400861 - 2³ = 36400853 is a prime.

It is a Duffinian number.

36400861 is a modest number, since divided by 861 gives 364 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36400801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2600055 + ... + 2600068.

It is an arithmetic number, because the mean of its divisors is an integer number (10400248).

Almost surely, 2^36400861 is an apocalyptic number.

It is an amenable number.

36400861 is a deficient number, since it is larger than the sum of its proper divisors (5200131).

36400861 is an equidigital number, since it uses as much as digits as its factorization.

36400861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5200130.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 36400861 is about 6033.3126058576. The cubic root of 36400861 is about 331.4137722976.

The spelling of 36400861 in words is "thirty-six million, four hundred thousand, eight hundred sixty-one".