69478740 has 72 divisors (see below), whose sum is σ = 213169320. Its totient is φ = 18315264.

The previous prime is 69478729. The next prime is 69478757. The reversal of 69478740 is 4787496.

It can be written as a sum of positive squares in 4 ways, for example, as 2304324 + 67174416 = 1518^2 + 8196^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13852 + ... + 18188.

It is an arithmetic number, because the mean of its divisors is an integer number (2960685).

Almost surely, 2^69478740 is an apocalyptic number.

69478740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69478740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106584660).

69478740 is an abundant number, since it is smaller than the sum of its proper divisors (143690580).

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

69478740 is a wasteful number, since it uses less digits than its factorization.

69478740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4441 (or 4436 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 69478740 is about 8335.3908126734. The cubic root of 69478740 is about 411.1029986766.

The spelling of 69478740 in words is "sixty-nine million, four hundred seventy-eight thousand, seven hundred forty".