43401387892 has 6 divisors (see below), whose sum is σ = 75952428818. Its totient is φ = 21700693944.

The previous prime is 43401387859. The next prime is 43401387899. The reversal of 43401387892 is 29878310434.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 40685310436 + 2716077456 = 201706^2 + 52116^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43401387899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5425173483 + ... + 5425173490.

Almost surely, 2^43401387892 is an apocalyptic number.

It is an amenable number.

43401387892 is a deficient number, since it is larger than the sum of its proper divisors (32551040926).

43401387892 is a wasteful number, since it uses less digits than its factorization.

43401387892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10850346977 (or 10850346975 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 49.

The spelling of 43401387892 in words is "forty-three billion, four hundred one million, three hundred eighty-seven thousand, eight hundred ninety-two".