40261554 has 24 divisors (see below), whose sum is σ = 87439872. Its totient is φ = 13388760.

The previous prime is 40261547. The next prime is 40261577. The reversal of 40261554 is 45516204.

40261554 is a `hidden beast` number, since 40 + 2 + 615 + 5 + 4 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5919 + ... + 10749.

It is an arithmetic number, because the mean of its divisors is an integer number (3643328).

Almost surely, 2^40261554 is an apocalyptic number.

40261554 is an abundant number, since it is smaller than the sum of its proper divisors (47178318).

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

40261554 is a wasteful number, since it uses less digits than its factorization.

40261554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5302 (or 5299 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 40261554 is about 6345.1992876505. The cubic root of 40261554 is about 342.7389889001.

Adding to 40261554 its reverse (45516204), we get a palindrome (85777758).

The spelling of 40261554 in words is "forty million, two hundred sixty-one thousand, five hundred fifty-four".