91729340 has 24 divisors (see below), whose sum is σ = 202770960. Its totient is φ = 34760448.

The previous prime is 91729333. The next prime is 91729357. The reversal of 91729340 is 4392719.

It is a self number, because there is not a number n which added to its sum of digits gives 91729340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120317 + ... + 121076.

It is an arithmetic number, because the mean of its divisors is an integer number (8448790).

Almost surely, 2^91729340 is an apocalyptic number.

It is an amenable number.

91729340 is an abundant number, since it is smaller than the sum of its proper divisors (111041620).

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

91729340 is a wasteful number, since it uses less digits than its factorization.

91729340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241421 (or 241419 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 91729340 is about 9577.5435263955. The cubic root of 91729340 is about 450.9926072570.

It can be divided in two parts, 917 and 29340, that multiplied together give a triangular number (26904780 = T₇₃₃₅).

The spelling of 91729340 in words is "ninety-one million, seven hundred twenty-nine thousand, three hundred forty".