91478436 has 24 divisors (see below), whose sum is σ = 243942720. Its totient is φ = 26136672.

The previous prime is 91478423. The next prime is 91478437. The reversal of 91478436 is 63487419.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (91478437) 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, 544431 + ... + 544598.

It is an arithmetic number, because the mean of its divisors is an integer number (10164280).

Almost surely, 2^91478436 is an apocalyptic number.

It is an amenable number.

91478436 is an abundant number, since it is smaller than the sum of its proper divisors (152464284).

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

91478436 is a wasteful number, since it uses less digits than its factorization.

91478436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089043 (or 1089041 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 91478436 is about 9564.4360000995. The cubic root of 91478436 is about 450.5810371001.

The spelling of 91478436 in words is "ninety-one million, four hundred seventy-eight thousand, four hundred thirty-six".