148211820 has 36 divisors (see below), whose sum is σ = 449576400. Its totient is φ = 39523104.

The previous prime is 148211813. The next prime is 148211851. The reversal of 148211820 is 28112841.

148211820 is a `hidden beast` number, since 1 + 482 + 1 + 182 + 0 = 666.

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

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, 411520 + ... + 411879.

Almost surely, 2^148211820 is an apocalyptic number.

148211820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

148211820 is an abundant number, since it is smaller than the sum of its proper divisors (301364580).

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

148211820 is a wasteful number, since it uses less digits than its factorization.

148211820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823414 (or 823409 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 148211820 is about 12174.2276962442. The cubic root of 148211820 is about 529.2094777056.

It can be divided in two parts, 14821 and 1820, that added together give a square (16641 = 129²).

The spelling of 148211820 in words is "one hundred forty-eight million, two hundred eleven thousand, eight hundred twenty".