40261556 has 12 divisors (see below), whose sum is σ = 71787492. Its totient is φ = 19750848.

The previous prime is 40261547. The next prime is 40261577. The reversal of 40261556 is 65516204.

It can be written as a sum of positive squares in 2 ways, for example, as 18490000 + 21771556 = 4300^2 + 4666^2 .

It is a super-2 number, since 2×40261556² = 3241985783082272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94745 + ... + 95168.

It is an arithmetic number, because the mean of its divisors is an integer number (5982291).

Almost surely, 2^40261556 is an apocalyptic number.

It is an amenable number.

40261556 is a deficient number, since it is larger than the sum of its proper divisors (31525936).

40261556 is a wasteful number, since it uses less digits than its factorization.

40261556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189970 (or 189968 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 40261556 is about 6345.1994452499. The cubic root of 40261556 is about 342.7389945753.

The spelling of 40261556 in words is "forty million, two hundred sixty-one thousand, five hundred fifty-six".