69870420 has 36 divisors (see below), whose sum is σ = 211940820. Its totient is φ = 18632064.

The previous prime is 69870397. The next prime is 69870433. The reversal of 69870420 is 2407896.

It can be written as a sum of positive squares in 2 ways, for example, as 16112196 + 53758224 = 4014^2 + 7332^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 193905 + ... + 194264.

It is an arithmetic number, because the mean of its divisors is an integer number (5887245).

Almost surely, 2^69870420 is an apocalyptic number.

69870420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

69870420 is an abundant number, since it is smaller than the sum of its proper divisors (142070400).

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

69870420 is a wasteful number, since it uses less digits than its factorization.

69870420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388184 (or 388179 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 69870420 is about 8358.8527921001. The cubic root of 69870420 is about 411.8740699741.

It can be divided in two parts, 69 and 870420, that added together give a square (870489 = 933²).

The spelling of 69870420 in words is "sixty-nine million, eight hundred seventy thousand, four hundred twenty".